Compressor.



PATENTED SEPT. 3, 1907/ N. A. CHRISTENSEN.

COMPRESSOR,

APPLICATION FILED AUG.13, 1002.

as 153 as /5J.9 33

I juenz 'onsiding at Milwaukp'e,

II-fl'r rio- NlELS ANTON CHRISTENSEN, or MILWAUKEE, WISCONSIN.

Specification of Letters Patent. Application filed August 13,1902.Serisllio.119,485.

comnnssoa;

Patented Sept. 3, 907.

.Teatlwhoin it"mag concern: l

Be it known that I, Nrnts Amos QrrsrsrsN in the county of lttilrraukeand State of Wisconsin, have invented certain nowandnsetul Improvementsin Compressors, of which the ioll w ing is a specification. I

My invention relates to those air compressors in which a lurality oi aircompressing cylinders are ern' ployed and the object thereoi is toprovide means for cutting out of service, so far as compression'isconcerned, any one or more of the compressing cylinders withoutdisturhim or interfering with the operation of the remaining cylindersor with their separate cooling coils as herein shown.

In the drawing Figure 1 is a front elevation of my combined motor andcompressor embodying the within improvements; Fig. 2 is a section takensubstantially centrally and longitudinally ot' one of the cylinders;

. and Fig. 3 a detail view oi one of the removable plates,

cooling coil and attached fixtures.

In the present instance to illustrate a compressor having a plurality ofcompressing cylinders, I have shown my type otcombincd motorandcomprcssor as patented to me on October 1?, 1899, by Letters Patent INo. 635,280, in which are ilt ustratcd two single acting pumps orcorrrpressors but in present application, I have chosen to illustrate ascrim or three such pumps or compressors;

- The main frame or compressor easing 1 forms an irrclosed crank chamber2 in which the crank shall. 3 and connections operate. In'a iorwardextension 4 oi the casing are formed or arranged a series of threecompression cylinders 5 in which travel pistons 6 connected by pitmen 7with the crank shaft. '1 he crank is driven by an,clectri(: motor 1" inthe manner described in my said patent. 'l he outer endsoi the cylindersare closed by a removable h ad 8 which is made hollow ior watercirculatiorrior cooling purposes. This head contains a discharge valve 9for each cylinder to govern discharge port 10 and thedischarge of airunder pressure from said port to the discharge passage ll.

The main casing has a partition or false bottom 12, forming the bottomproper for the crank-shalt chamber and the top of a cooling coil chamber13 thereby formed by such ialse bottour between it and the bottom propermarked 14.

Immediately below each cylinder, the cooling coil chamber has an openingwhich is closcd by a row I table plate or cover 15 seeurcd'to thecasing.

three cylinders illustrated in the'drawings, so there are three suchopeningsiclosed by as many plates'or covers ,asshowniriFig'. 1.

Referring to Figs. 2 and 3, each plate or cover 15 has connected to itin such manner as to be removable with it g. cooling coil 16, whose twoends arebrazed or otherwise tastened t6 the cover. There are three oithese cooling ggils, one for eachplate'and consequently one ior eachcylinder, and the same are arranged in the cooling eoil chamber 13hereinhefore described.

The disehargepassage 11 from each cylinder terminates in a. 17 which isscrew threaded to receive a coupling nut '15 for securing or couplingthereto the and of a, goo e noel; connection 19 whose other end issecured to its respective plate 15 and in such manner as tocommunicatewith the cooling oil attached to that plate.

To=rceive the compressed air irorn all of the compressing cylindersaftcr it has traversed the coolingcoils and thereby become cooled and toconduct such compressed air to a storage reservoir or to a place of use,I employ a discharge pipe 20 common to all the cylinders and extendingtransversely of the compressor in iront oi the cooling-coil chamber, asillustrated in'Fig. 1.

Each removable plate 15 has an extension 21 in which is a passage 22communicating between the delivery end of the cooling-coil and thecommon discharge pipe 20 as best seen in Fig. 21 This communicatingpassage '22 is governed by'a cutout valve of suitable and approvedconstruction (not shown) and operated and locked by the handles 23, withthe result that such passage may be opened or closed as desired by theoperator.

The hereinbeiore described arrangement is such that in case it isnecrssary to inspect, overhaul or repair the suctionor discharge valveof any one oi the compressing cylinders, such particular cylinder may becut out oi connection with the other or active compressing cyl-' I thusas to work in cornunction with its companions.

As there-arc i provide a compressor having a plurality of compressingThe discharge valve may cylinders independent of .eacliother as to theircompressing functions, and each provided with its (iwn.

cooling-c0i1 and its own cut-out valve.

I claim: p I

5 In a compressor, the combination of acasing, a series oi! cylindersarranged'therein tor independently compressing air, a correspondingseriesol pistons, a single crank shaft, a series of connecting rodsbetween the pistons and crankshaft, 11 corresponding serles of separateand Independent 10 delivery pipes orpassages one for each cylinder, 0.discharge pip'e common to all of said delivery pipes and comss i's v tmunicating therewith along its length, and a series of independentlyoperating and separately controlled cutout valves, one for each deliverypipe wherebyany. ormoreot the cylinders may he cut out of'servlcewithoutstopping l!) the compressor or interfering with "the tnnction'oroperatlon of the'remainlng cylinder 0r cylinders.

Witnesses I. Dumps.-

Bmm Snonnnmzo.

